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Apple Pay is a payment service that allows users to make purchases using their iPhone or Apple Watch. It supports tap-to-pay in physical retail stores, online apps and websites, and person-to-person payments with Apple Cash. To use Apple Pay, you need to add at least one credit or debit card to Apple Wallet. When using Apple Pay in physical retail stores, it's important to check if the store supports it by looking for the tap-to-pay logo or the Apple Pay icon. To make a payment with iPhone, double-click the side button, authenticate with Face ID or Touch ID, and tap the top of the phone to the card reader. For Apple Watch, double-click the side button, tap the watch to the payment terminal, and wait for the transaction to go through. If Apple Pay doesn't work, ensure that the location accepts it and ask for assistance.
Double-click the side button on the right side of your iPhone. Look at your iPhone to authenticate with Face ID (or place your finger on the Touch ID sensor if it's an older model). Tap the top of your phone to the card reader, usually near where you see a tap-to-pay logo. You'll see a checkmark and hear a ding when the payment reads successfully.
Not all retail stores support Apple Pay. For example, Walmart and Home Depot do not accept Apple Pay. To determine if a store accepts the service, look for the tap-to-pay logo or ask Siri to show nearby locations that accept Apple Pay. If the payment doesn't work, ensure that the location supports Apple Pay and ask someone working there for assistance.
If it doesn't work, ensure the location accepts Apple Pay and that their systems are running. If so, ask someone working there about the best spot to tap on their payment terminal.